A vibration testing device for supporting the rear armrest of an electric vehicle made of magnesium alloy

Abstract

The present invention relates to the technical field of physical vibration testing equipment, and discloses a vibration testing equipment for supporting an electric vehicle magnesium alloy rear armrest, including a test bench frame, and further including: a lifting plate, which is arranged to move up and down at the top of the test bench frame; a sliding plate, which is slidably installed in a chute opened at the top of the lifting plate and is used to carry the armrest body; a pressing sleeve, which is sleeved and pressed tightly on the top of the armrest body. This vibration testing equipment for supporting an electric vehicle magnesium alloy rear armrest, through the combined design of the lifting plate and the sliding plate, can realize the synchronous vibration testing of the armrest body in the up-and-down and front-and-back directions, comprehensively simulate the multi-dimensional load conditions of the armrest in actual use, and then through the collection and physical analysis of the test data, can evaluate the mechanical properties and load response of the armrest in actual use, so as to comprehensively evaluate the advantages and disadvantages of the multi-dimensional performance of the armrest, ensuring the authenticity and comprehensiveness of the test.

Description

Technical Field

[0001] The present invention relates to the technical field of physical vibration testing equipment, and particularly to a vibration testing equipment for supporting the magnesium alloy rear armrest of an electric vehicle. Background Art

[0002] With the rapid development of the electric vehicle industry, vehicle lightweighting has become an important direction for improving the overall vehicle performance and energy efficiency. Due to its low density, high specific strength, good shock absorption performance and other advantages, magnesium alloy is widely used in the manufacturing of electric vehicle accessories, such as the rear armrest of electric vehicles. However, magnesium alloy materials also have certain defects, such as low fatigue limit and impact resistance. Therefore, the rear armrest made of magnesium alloy is prone to cracks, deformation or even fracture due to long-term vibration or impact during actual use. Therefore, it is very necessary to conduct a comprehensive mechanical test on the vibration performance of the magnesium alloy rear armrest.

[0003] Most traditional vibration testing equipment adopts a single-axis vibration mode, that is, the test object can only move in a single direction, either vertically or horizontally, and it is difficult to achieve synchronous vibration testing in the up and down and front and back directions, which results in its inability to comprehensively simulate the multi-dimensional loads suffered by the armrest during actual use. In addition, the current vibration testing equipment on the market usually cannot apply intermittent instantaneous pressure to the test piece, which makes it difficult for the vibration test to restore the instantaneous stress environment of the armrest under special working conditions such as bumpy roads and external forces (such as pressing with the back of the hand), thereby limiting the authenticity and reference value of the test results, especially for magnesium alloy with poor impact resistance.

[0004] Based on this, we propose a vibration testing equipment for supporting the magnesium alloy rear armrest of an electric vehicle. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a vibration testing equipment for supporting the magnesium alloy rear armrest of an electric vehicle, which has the advantages of being able to achieve synchronous vibration testing in the up and down and front and back directions, and being able to apply instantaneous pressure to the magnesium alloy rear armrest to test its impact resistance.

[0007] (II) Technical Solutions

[0008] To achieve the above-mentioned purposes of being able to achieve synchronous vibration testing in the up and down and front and back directions, and being able to apply instantaneous pressure to the magnesium alloy rear armrest to test its impact resistance, the present invention provides the following technical solutions: A vibration testing equipment for supporting the magnesium alloy rear armrest of an electric vehicle, including a test bench, and further including:

[0009] A lifting plate, which is movably arranged up and down at the top of the test bench;

[0010] The sliding plate is slidably installed in the chute opened at the top of the lifting plate and is used to carry the armrest body;

[0011] The pressing sleeve is sleeved and pressed tightly on the top of the armrest body;

[0012] The pressing sleeve is installed on the cross arm through the presser at its top, the end of the cross arm is connected to the pressing mechanism, and the pressing mechanism can provide intermittent instantaneous pressure on the armrest body through the cross arm, presser and pressing sleeve.

[0013] As a preferred technical solution of the present invention, a connecting plate is fixedly installed at the bottom of the lifting plate, the bottom end of the connecting plate passes through the test bench and is fixedly connected with a rectangular frame, an eccentric wheel is rotatably installed in the rectangular frame, and the eccentric wheel is driven by an offset drive shaft.

[0014] As a preferred technical solution of the present invention, the end of the drive shaft is fixedly connected with a rotating arm, the other end of the rotating arm is hinged to the lower hinge rod, the other end of the lower hinge rod is hinged to the vertical rod, the middle of the vertical rod is rotatably installed on the fixed seat through the middle shaft, and the fixed seat is fixedly installed on the side of the test bench;

[0015] The top end of the vertical rod is hinged with an upper hinge rod, the other end of the upper hinge rod is rotatably installed in the connecting seat, and the connecting seat is fixedly installed at the end of the sliding plate.

[0016] As a preferred technical solution of the present invention, the presser includes a top rod, an inner plate, a fixed cylinder and a lower support spring. The top of the pressing sleeve is fixedly connected with the inner plate through the top rod. The inner plate is movably arranged up and down in the fixed cylinder and is supported downward by the lower support spring. The fixed cylinder is arranged on the cross arm.

[0017] As a preferred technical solution of the present invention, the pressing mechanism includes a mounting plate, an inner moving plate, a piston, a vertical cabinet, a support spring, a bracket, a support arm and a connecting pipe;

[0018] A bracket is supported by a support arm on the side of the top of the sliding plate. A vertical cabinet is fixedly installed on the bracket. A piston is movably arranged up and down in the vertical cabinet. The bottom of the piston is fixedly installed with an inner moving plate. The inner moving plate is supported by a support spring. The side of the inner moving plate is fixedly installed with a mounting plate. The end of the cross arm is fixedly installed on the mounting plate;

[0019] One side of the top of the vertical cabinet is connected with a gas supply mechanism through a connecting pipe for instantaneously introducing gas, and the other side of the top of the vertical cabinet is provided with a fine hole for discharging gas.

[0020] As a preferred technical solution of the present invention, the gas supply mechanism includes a gas cabinet, a moving plug, a horizontal spring, a push rod and a push plate;

[0021] On the side of the top of the lifting plate, a gas cabinet is fixedly installed. The gas cabinet is connected to the vertical cabinet through a connecting pipe, and a one-way exhaust valve is provided on the connecting pipe;

[0022] A one-way intake valve is also provided on the gas cabinet;

[0023] A movable plug is movably arranged in the gas cabinet. The movable plug is supported by a horizontal spring. On the other side of the movable plug, a push plate is fixedly connected through a push rod, and the push plate can be pushed by a sliding plate.

[0024] As a preferred technical solution of the present invention, a vertical rod is fixedly installed on the top of the test bench. The top end of the vertical rod is fixedly connected with a connecting arm. The end of the connecting arm is fixedly connected with a loading rod. A plurality of movable sleeves are installed on the loading rod. The movable sleeves are connected with impact balls through elastic rods. When the armrest body is driven by the lifting plate to move upward, the armrest body will impact on the impact balls.

[0025] As a preferred technical solution of the present invention, the movable sleeve is slidably sleeved on the loading rod;

[0026] A spline is formed by the convexity on the outer wall of the loading rod. The spline is slidably arranged in a spline groove, and the spline groove is opened on the inner wall of the movable sleeve.

[0027] As a preferred technical solution of the present invention, the pressing sleeve is a rubber sleeve, and a card slot for clamping on the armrest body is opened at the bottom.

[0028] As a preferred technical solution of the present invention, the compactor is slidably installed on the cross arm.

[0029] (III) Beneficial effects

[0030] Compared with the prior art, the present invention provides a vibration test device for supporting an electric vehicle magnesium alloy rear armrest, having the following beneficial effects:

[0031] 1. The vibration test device for supporting the electric vehicle magnesium alloy rear armrest, through the combined design of the lifting plate and the sliding plate, can realize the synchronous vibration test of the armrest body in the up and down and front and back directions, comprehensively simulate the multi-dimensional load conditions of the armrest in actual use, and then through the collection and physical analysis of the test data, can evaluate the mechanical properties and load response of the armrest in actual use, so as to comprehensively evaluate the advantages and disadvantages of the multi-dimensional performance of the armrest, ensuring the authenticity and comprehensiveness of the test.

[0032] 2. The vibration test device for supporting the electric vehicle magnesium alloy rear armrest, through the pressing mechanism, can apply an instantaneous pressure on the armrest body, restoring the instantaneous stress environment of the armrest body under special working conditions such as bumpy roads and external forces (such as pressing with the back of the hand), providing a more real and reliable basis for the evaluation of the fatigue performance and bearing capacity of the magnesium alloy material.

[0033] 3. The vibration test equipment for the magnesium alloy rear armrest of the electric vehicle can simulate the additional impacts that the armrest body may withstand during actual use by hitting the impact ball with the armrest body, evaluate its impact resistance and stress concentration effect, and further improve the comprehensiveness of the test on the armrest body. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Isometric view of the present invention Figure 1 ;

[0035] Figure 2 Isometric view of the present invention Figure 2 ;

[0036] Figure 3 Front view of the present invention;

[0037] Figure 4 Enlarged schematic view of the lifting plate part of the present invention;

[0038] Figure 5 Cross-sectional view of the fixed cylinder part of the present invention;

[0039] Figure 6 Cross-sectional view of the vertical cabinet part of the present invention;

[0040] Figure 7 Enlarged schematic view of the loading rod part of the present invention;

[0041] Figure 8 Side view of the armrest body part of the present invention.

[0042] In the figure: 1. Test bench; 2. Lifting plate; 3. Slide groove; 4. Slide plate; 5. Armrest body; 6. Drive shaft; 7. Eccentric wheel; 8. Rectangular frame; 9. Connecting plate; 10. Rotating arm; 11. Lower hinge rod; 12. Vertical rod; 13. Fixed seat; 14. Upper hinge rod; 15. Connecting seat; 16. Compression sleeve; 17. Thrust rod; 18. Inner plate; 19. Fixed cylinder; 20. Lower support spring; 21. Cross arm; 22. Mounting plate; 23. Inner moving plate; 24. Piston; 25. Vertical cabinet; 26. Support spring; 27. Bracket; 28. Support arm; 29. Connecting pipe; 30. Gas cabinet; 31. Moving plug; 32. Horizontal spring; 33. Push rod; 34. Push plate; 35. Vertical rod; 36. Connecting arm; 37. Loading rod; 38. Moving sleeve; 39. Elastic rod; 40. Impact ball. DETAILED DESCRIPTION OF THE INVENTION

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment 1:

[0045] Please refer to Figures 1-4 , a vibration test device for supporting a magnesium alloy rear armrest of an electric vehicle, including a test bench 1. The test bench 1 can be fixed to the ground through support legs or installed on the side of a workbench. In short, just keep it fixed, and those skilled in the art can select the fixing method as needed.

[0046] In this embodiment, a lifting plate 2 is movably arranged up and down on the top of the test bench 1. Specifically, as Figure 3 shown, a connecting plate 9 is fixedly installed at the bottom of the lifting plate 2. The bottom end of the connecting plate 9 passes through the test bench 1 and is fixedly connected to a rectangular frame 8. An eccentric wheel 7 is rotatably installed in the rectangular frame 8. The eccentric wheel 7 is driven by an offset drive shaft 6, and the drive shaft 6 is driven by a motor. When the drive shaft 6 drives the eccentric wheel 7 to rotate, the eccentric wheel 7 can drive the rectangular frame 8 to move up and down. The up and down movement of the rectangular frame 8 can drive the lifting plate 2 to move up and down through the connecting plate 9, realizing "up and down vibration".

[0047] As Figure 2 shown, a sliding plate 4 is slidably installed in a chute 3 opened at the top of the lifting plate 2. Specifically, the end of the drive shaft 6 is fixedly connected to a rotating arm 10. The other end of the rotating arm 10 is hinged to a lower hinge rod 11. The other end of the lower hinge rod 11 is hinged to a vertical rod 12. The middle of the vertical rod 12 is rotatably installed on a fixed seat 13 through a central axis. The fixed seat 13 is fixedly installed on the side of the test bench 1. The top end of the vertical rod 12 is hinged to an upper hinge rod 14. The other end of the upper hinge rod 14 is rotatably installed in a connecting seat 15. The connecting seat 15 is fixedly installed at the end of the sliding plate 4. When the drive shaft 6 drives the eccentric wheel 7 to rotate and the lifting plate 2 moves up and down, it will also drive the rotating arm 10 to rotate. The rotating arm 10 rotates to pull or push the lower hinge rod 11, and then through the transmission of the vertical rod 12, it can pull or push the upper hinge rod 14. Furthermore, it can make the sliding plate 4 slide in the chute 3. By the back-and-forth sliding of the sliding plate 4 in the chute 3, "left and right vibration" can be realized, and the vibration test of the armrest body 5 is carried out mechanically.

[0048] In this embodiment, the magnesium alloy armrest body 5 is fixed to the sliding plate 4, so that the synchronous vibration test of the armrest body 5 in the up and down and front and back directions can be realized, comprehensively simulating the multi-dimensional load conditions of the armrest in actual use, and improving the authenticity and comprehensiveness of the test.

[0049] The armrest body 5 is specifically fixed to the sliding plate 4 by bolts through its own Z-shaped feet.

[0050] Such as Figure 4 shown, a pressure sleeve 16 is also sleeved on the top of the armrest body 5. The pressure sleeve 16 is a rubber sleeve, and a card slot for being stuck on the armrest body 5 is opened at the bottom. Through the sleeving of the pressure sleeve 16 on the top of the armrest body 5, the actual force when the armrest body 5 is held by hand can be simulated, thus ensuring the authenticity and reliability of the test results.

[0051] Embodiment Two:

[0052] Please refer to Figures 5-7 , on the basis of Embodiment One, a pressing mechanism is added in this embodiment. The pressing mechanism can provide intermittent instantaneous pressure on the armrest body 5 through the cross arm 21, the presser and the pressure sleeve 16, so as to simulate and restore the instantaneous force environment of the armrest body 5 under special working conditions such as bumping and external force (such as pressing with the back of the hand), and provide a more real and reliable basis for the evaluation of the fatigue performance and bearing capacity of the magnesium alloy material.

[0053] Such as Figure 4 shown, the pressure sleeve 16 is installed on the cross arm 21 through the presser at its top, and the end of the cross arm 21 is connected to the pressing mechanism;

[0054] In this embodiment, the presser includes a top rod 17, an inner plate 18, a fixed cylinder 19 and a lower support spring 20. The top of the pressure sleeve 16 is fixedly connected with an inner plate 18 through the top rod 17. The inner plate 18 is arranged to move up and down in the fixed cylinder 19 and is supported downward by the lower support spring 20. The fixed cylinder 19 is arranged on the cross arm 21. Through the downward support force provided by the lower support spring 20, the pressure sleeve 16 can always be in close contact with the armrest body 5, thus ensuring a stable pressing effect.

[0055] In the present invention, the pressing mechanism includes a mounting plate 22, an inner moving plate 23, a piston 24, a vertical cabinet 25, a support spring 26, a bracket 27, a support arm 28 and a connecting pipe 29. Such as Figure 6As shown in the figure, a bracket 27 is supported by a support arm 28 on the top side of the sliding plate 4. A vertical cabinet 25 is fixedly installed on the bracket 27. A piston 24 is movably arranged up and down in the vertical cabinet 25. A moving plate 23 is fixedly installed at the bottom of the piston 24. The moving plate 23 is supported by a support spring 26. An installation plate 22 is fixedly installed on the side of the moving plate 23. The end of the cross arm 21 is fixedly installed on the installation plate 22. One side of the top of the vertical cabinet 25 is connected to a gas supply mechanism through a connecting pipe 29 for instantaneously introducing gas. The other side of the top of the vertical cabinet 25 is provided with a fine hole for discharging gas. When the gas supply mechanism instantaneously introduces gas, under the action of air pressure, the piston 24 will be pushed downward. The downward movement of the piston 24 can further provide an instantaneous pressure on the armrest body 5 through the cross arm 21, the presser and the pressing sleeve 16. Then, the gas in the vertical cabinet 25 is discharged through the fine hole, and the instantaneous pressure disappears.

[0056] The gas supply mechanism specifically includes a gas cabinet 30, a moving plug 31, a horizontal spring 32, a push rod 33 and a push plate 34. As Figure 6 shown in the figure, a gas cabinet 30 is fixedly installed on the side of the top of the lifting plate 2. The gas cabinet 30 is communicated with the vertical cabinet 25 through a connecting pipe 29, and a one-way exhaust valve is arranged on the connecting pipe 29. A one-way intake valve is also arranged on the gas cabinet 30. A moving plug 31 is movably arranged in the gas cabinet 30. The moving plug 31 is supported by a horizontal spring 32. The other side of the moving plug 31 is fixedly connected to a push plate 34 through a push rod 33. The push plate 34 can be pushed by the sliding plate 4. When the sliding plate 4 moves left and right (from Figure 6 a perspective), the push plate 34 will be cyclically pushed to move, and thus the moving plug 31 can be cyclically moved. When the moving plug 31 moves to the right, the air in the gas cabinet 30 can be filled into the vertical cabinet 25 through the connecting pipe 29, so as to provide an instantaneous pressure; when the moving plug 31 moves to the left under the restoring force of the horizontal spring 32, it is used to conduct through the one-way intake valve for the next cycle;

[0057] Therefore, in this embodiment, when the sliding plate 4 moves left and right to simulate left and right vibrations, through the gas supply mechanism and the pressure application mechanism, an instantaneous pressure can be cyclically applied on the armrest body 5, restoring the instantaneous stress environment of the armrest body 5 under special working conditions such as bumping and external force (such as pressing with the back of the hand), providing a more real and reliable basis for the evaluation of the fatigue performance and load-bearing capacity of the magnesium alloy material.

[0058] In the present invention, the presser is slidably installed on the cross arm 21 and its position is adjustable, so as to facilitate multi-point testing of the armrest body 5; for the specific adjustment method, those skilled in the art can select according to actual needs. For example, a lead screw can be rotatably installed in the cross arm 21, a nut is threadedly connected to the outer wall of the lead screw, and the nut is fixedly connected to the presser.

[0059] Embodiment 3:

[0060] Please refer toFigure 2 , Figure 7 and Figure 8 , on the basis of Embodiment 1 or Embodiment 2, in this embodiment, a vertical rod 35 is fixedly installed on the top of the test bench 1. The top end of the vertical rod 35 is fixedly connected with a connecting arm 36. The end of the connecting arm 36 is fixedly connected with a loading rod 37. A plurality of moving sleeves 38 are installed on the loading rod 37. Each moving sleeve 38 is connected with an impact ball 40 through an elastic rod 39. When the armrest body 5 is driven by the lifting plate 2 to move upward, the armrest body 5 will hit the impact ball 40, thereby simulating an impact load;

[0061] In this embodiment, the moving sleeve 38 is slidably sleeved on the loading rod 37. Specifically, splines are formed on the outer wall of the loading rod 37. The splines are slidably arranged in the spline grooves. The spline grooves are opened on the inner wall of the moving sleeve 38. Through the cooperation of the splines and the spline grooves, the moving sleeve 38 can freely adjust its position on the loading rod 37 to meet the test requirements of armrest bodies 5 of different sizes and also facilitate avoiding the pressing sleeve 16.

[0062] The elastic rod 39 can be bent, providing buffering ability for the impact ball 40, so that the test can be closer to the actual working conditions.

[0063] Through the impact test of the impact ball 40, this embodiment can reproduce the stress concentration situation of the armrest caused by external forces during vehicle vibration, evaluate its impact resistance performance and fatigue life. Combining the vibration test in Embodiment 1 and the instantaneous pressure test in Embodiment 2, this device can comprehensively cover the performance of the armrest under complex loads, providing a scientific basis for the design and optimization of the magnesium alloy armrest.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration test device for a magnesium alloy rear armrest of an electric vehicle, comprising a test bench (1), characterized in that: Also includes: A lifting plate (2) is movably arranged on the top of the test bench (1); A sliding plate (4) is slidably mounted in a sliding groove (3) provided at the top of the lifting plate (2) and is used to carry the armrest body (5); A pressing sleeve (16) is clamped and pressed tightly on the top of the handrail body (5); The pressing sleeve (16) is mounted on the cross arm (21) via a compression device at the top thereof, and the end of the cross arm (21) is connected to a pressure-applying mechanism, and the pressure-applying mechanism is capable of providing intermittent instantaneous pressure on the handrail body (5) via the cross arm (21), the compression device and the pressing sleeve (16); The pressure-applying mechanism comprises a mounting plate (22), an inner moving plate (23), a piston (24), a vertical cabinet (25), a supporting spring (26), a bracket (27), a supporting arm (28) and a connecting pipe (29); A bracket (27) is supported on the side of the top of the sliding plate (4) by a supporting arm (28), a vertical cabinet (25) is fixedly mounted on the bracket (27), a piston (24) is movably arranged in the vertical cabinet (25), an inner moving plate (23) is fixedly mounted on the bottom of the piston (24), the inner moving plate (23) is supported by a supporting spring (26), a mounting plate (22) is fixedly mounted on the side of the inner moving plate (23), and the end of the cross arm (21) is fixedly mounted on the mounting plate (22); One side of the top of the vertical cabinet (25) is connected to a gas supply mechanism via a connecting pipe (29) for instantaneous introduction of gas, and the other side of the top of the vertical cabinet (25) is provided with fine holes for exhausting gas; The gas supply mechanism comprises a gas cabinet (30), a movable plug (31), a transverse spring (32), a push rod (33) and a push plate (34); A gas cabinet (30) is fixedly mounted on the side of the top of the lifting plate (2), and the gas cabinet (30) is connected to the vertical cabinet (25) through a connecting pipe (29), and a one-way exhaust valve is provided on the connecting pipe (29); The gas cabinet (30) is also provided with a one-way air inlet valve; A movable plug (31) is movably arranged in the gas cabinet (30), and the movable plug (31) is supported by a transverse spring (32). A push plate (34) is fixedly connected to the other side of the movable plug (31) via a push rod (33), and the push plate (34) can be pushed by the sliding plate (4).

2. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: A connecting plate (9) is fixedly mounted on the bottom of the lifting plate (2); the bottom end of the connecting plate (9) passes through the test bench (1) and is fixedly connected to a rectangular frame (8); an eccentric wheel (7) is rotatably mounted in the rectangular frame (8); the eccentric wheel (7) is driven by an offset drive shaft (6).

3. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 2, characterized in that: The end of the driving shaft (6) is fixedly connected to a rotating arm (10), the other end of the rotating arm (10) is hinged to a lower hinge rod (11), the other end of the lower hinge rod (11) is hinged to a vertical rod (12), the middle part of the vertical rod (12) is rotatably mounted on a fixed seat (13) via a central axis, and the fixed seat (13) is fixedly mounted on a side of the test bench (1); An upper hinge rod (14) is hingedly connected to the top end of the vertical rod (12); the other end of the upper hinge rod (14) is rotatably mounted in a connecting seat (15); and the connecting seat (15) is fixedly mounted on the end of the sliding plate (4).

4. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: The clamp comprises a push rod (17), an inner plate (18), a fixed cylinder (19) and a lower support spring (20); the top of the pressing sleeve (16) is fixedly connected to the inner plate (18) via the push rod (17); the inner plate (18) is movably arranged in the fixed cylinder (19) and supported downward by the lower support spring (20); the fixed cylinder (19) is arranged on a cross arm (21).

5. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: A vertical pole (35) is fixedly mounted on the top of the test bench (1); a connecting arm (36) is fixedly connected to the top of the vertical pole (35); a loading rod (37) is fixedly connected to the end of the connecting arm (36); a plurality of movable sleeves (38) are mounted on the loading rod (37); the movable sleeves (38) are connected to an impact ball (40) via an elastic rod (39); when the armrest body (5) is driven by the lifting plate (2) to move upward, the armrest body (5) will collide with the impact ball (40).

6. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 5, characterized in that: The movable sleeve (38) is slidably mounted on the loading rod (37); The outer wall protrusion of the loading rod (37) is formed with a spline, and the spline is slidably arranged in a flower groove, and the flower groove is opened on the inner wall of the moving sleeve (38).

7. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: The pressing sleeve (16) is a rubber sleeve, and a slot for clamping on the armrest body (5) is provided at the bottom.

8. A vibration testing device for magnesium alloy rear armrests of electric vehicles according to claim 1 or 4, characterized in that: The presser is slidably mounted on the cross arm (21).

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